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Coal Mine Equipment Rock Drilling Dth Bit For Mining

Rock drilling tools.Tunneling tools full bridge coupling sleeve r22 r25 r28 r32 extension rod.T6 76 t6 86 t6 101 casing threaded drill bits tungsten carbide material.T38 bench drilling rock drill bits diameter 38mm for mining machine parts.Oem thenching tools coal mining drill bits , 38 30mm coal mining picks.Thread button bit.